Please confirm the order of firmware upgrade.
unpack fpga261.rar
flash .ADR
reboot
flash .BIN
reboot
unpack app252
flash .hex
unpack sys151
flash .hex
or I should do it in another sequence
unpack app252
flash .hex
unpack sys151
flash .hex
and after it I should do
unpack fpga261.rar
flash .ADR
reboot
flash .BIN
reboot
Sorry for noob question.